Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32876 | Disc cassette (disc cartridge) | Kihachiro Minami, Tohru Sanpei, Kazutoshi Konno | 1989-02-21 |
| 4796140 | Removable disk construction | Tohru Sampei, Hiroshi Kanai, Tomiyoshi Satoo, Yosuke Nagano, Takeo Sonobe +1 more | 1989-01-03 |